Operating Limits; Engine Speed; Performance - Rotax 915 i A SERIES Operator's Manual

2.1) Operating limits

General

Engine speed

Performance

Page 2-2
December 01 2017
Monitor Operating limits. Limits must not be exceeded. If one or
more operating limits are exceeded, the engine must be operated so
that the values fall back into the allowed range. Carry out instruc-
performance is measured under following boundary conditions:
• Standard engine (without governor). Without auxiliary equip-
ment (e.g. external alternator)
• Installation in accordance with installation guidelines (e.g. in-
take and exhaust system). See latest Installation Manual
• ISA Condition(International Standard Atmosphere)
Parameter
Engine speed at idle
Engine speed
The engine performance is approximately proportional to the
airflow value and can be calculated as follows:
Observed Power [kW] ~-6.3264+0.0169*Airflow [g/min]
Parameter
Take-off Performance
(engine speed: 5800
rpm)
Continuous Perform-
ance (engine speed:
5500 rpm)
Critical Altitude (MAT:
max. 50 °C (120 °F))
NOTE
The max. Continuous performance is available up to the critical
altitude.
BRP-Rotax
ATTENTION
tions for abnormal operation
Min.
1800 rpm
–
Min.
–
–
Effectivity: 915 i A Series
Max.
–
5800 rpm (max. 5
minutes)
Max.
104 kW
99 kW (without
governor)
15000 ft
Edition 0 / Rev. 0